I am nobody to judge and the only ones who knows if your clean is God and You Whitney!!!
You still has a beautiful voice but you need to fully let everything to God,
Have you consider sing only Christian Music??
You can be an example for all the people that is struggling right now with drugs. Treat your body as the temple of God get away of all the temptations that sarrounds you even if it means getting away from the glamour of the music industry. I am happy that you feel comfortable on your own body but remember the enemy is a tricky bastard that likes to give a false sense of comfort so you will be more vulnerable. I really hope that you can overcome this and see you sing your beautiful voice praising God in all your songs. Take care and stay focus on God!!!!!!